package core.collection.mymap;

import core.collection.bean.Student;

import java.util.Comparator;
import java.util.TreeMap;

/**
 * @author
 * @create 2018-12-23 12:32
 **/
public class mymap_5_Map_TreeMap {
    /**
     * * A:案例演示
     * TreeMap集合键是Student值是String的案例
     */
    public static void main(String[] args) {
        //demo_Comparator();
        demo_Comparator2();
    }

    public static void demo_Comparator2(){
        TreeMap<Student, String> tm = new TreeMap<>(new Comparator<Student>() {
            @Override
            public int compare(Student s1, Student s2) {
                int num = s1.getName().compareTo(s2.getName());
                //按照姓名比较
                return num == 0 ? s1.getAge() - s2.getAge() : num;
                //姓名一样再比较年龄
            }
        });
        tm.put(new Student("张三", 23), "北京");
        tm.put(new Student("李四", 13), "上海");
        tm.put(new Student("赵六", 43), "深圳");
        tm.put(new Student("王五", 33), "广州");

        System.out.println(tm);
    }

    public static void demo_Comparator() {
        TreeMap<Student, String> tm = new TreeMap<>();
        tm.put(new Student("张三", 23), "北京");
        tm.put(new Student("李四", 13), "上海");
        tm.put(new Student("王五", 33), "广州");
        tm.put(new Student("赵六", 43), "深圳");

        System.out.println(tm);
    }

}
